| Weight | 18 lbs |
|---|---|
| Pump Mounting Flange | 2-Bolt Flange (SAE "A" size) |
| Manufacturer | Fluidyne Fluid Power |
| Pumps Drive Shaft | 3/4" Straight Shaft with Key |
| Pumps Rotation | Right-Hand (Clockwise) |
| Pumps Max Pressure | 2500 psi |
| Pumps Rated Speed | 1200 RPM |
| Pumps Max Speed | 3400 RPM |
| Pumps Displacement | 18.0 cm³/r (1.10 in³/r) |
| Pumps Ports In | G1" BSPP Straight Thread |
| Pumps Ports Out | G1/2" BSPP Straight Thread |
These FluiDyne V20 Series hydraulic vane pumps all offer direct Vickers interchangeability and are built to SAE J744 standards, but differ in flow rate, displacement, max speed, port orientation, shaft type, rotation, and inlet/outlet sizing. Choosing the right model depends on system flow demand, piping layout, available mounting space, and drive direction. For a broader selection, see our hydraulic pumps catalog.
?? Important: The specifications shown are for reference and comparison purposes. Always verify specifications with the official manufacturer documentation or contact our technical team at (800) 823-4937 before ordering to ensure compatibility with your application. We cannot accept returns due to specification mismatches.
| Model Number | Flow Rate | Max Pressure | Displacement | Mounting |
|---|---|---|---|---|
| WF8201139 (Current) | 5.7 GPM | 2500 PSI | 18.0 cm³/r (1.10 in³/r) | 2-Bolt Flange (SAE “A” size) |
| WF8201138 | 13.5 GPM | 2500 PSI | 42.6 cm³/r (2.60 in³/r) | 2-Bolt Flange (SAE “A” size) |
| WF8201144 | 8.4 GPM | 2500 PSI | 26.6 cm³/r (1.62 in³/r) | 2-Bolt Flange (SAE “A” size) |
| WF8201179 | 9.4 GPM | 2500 PSI | 29.7 cm³/r (1.81 in³/r) | 2-Bolt Flange (SAE “A” size) |
| WF8201171 | 8.4 GPM | 2500 PSI | 26.6 cm³/r (1.62 in³/r) | 2-Bolt Flange (SAE “A” size) |
Difference: WF8201138 offers the highest flow (13.5 GPM, 2.60 in³/r); WF8201139 is lowest (5.7 GPM, 1.10 in³/r); WF8201144, WF8201171 (8.4 GPM, 1.62 in³/r), WF8201179 (9.4 GPM, 1.81 in³/r)
Selection Guide: Select higher displacement/flow models for systems with large actuators or multiple functions; use lower flow models for compact or lower-demand systems
Difference: WF8201139/1138 rated for 1200 RPM, WF8201144/1171/1179 up to 2800 RPM
Selection Guide: Choose WF8201144, WF8201171, or WF8201179 for high-speed drive applications
Difference: WF8201179 is Left-Hand (Counter-Clockwise); other models are Right-Hand (Clockwise)
Selection Guide: Choose WF8201179 when your prime mover requires counter-clockwise pump rotation
Difference: WF8201139/1138 have ports inline with inlet (0°); others are opposite (180°)
Selection Guide: Inline (0°) orientation suits straight-through piping; 180° is preferred if piping must exit on opposite sides
Difference: WF8201139 has 9-tooth splined shaft; others use 3/4″ straight keyed shaft, with extension lengths varying (1.75″ or 2.66″). For a similar 18.0 cm³/r (1.10 in³/r) option, see V201P5P18C11R – FluiDyne V20 Pump.
Selection Guide: Select the splined shaft for higher-torque or splined coupler drives; straight shaft for standard keyed coupling
Difference: WF8201139/1138/1144: 1-1/4″ NPT inlet; WF8201171: 1″ NPT inlet; WF8201179: 1-1/4″ NPT inlet. Outlet is typically 3/4″ NPT except WF8201179 (1-1/16″-12 straight)
Selection Guide: Match inlet/outlet size to your system piping to minimize flow restriction
If you need: Highest flow for large or multi-cylinder systems (over 9 GPM)
Choose: WF8201138
Because: Delivers 13.5 GPM at 1200 RPM, highest in this group
If you need: Compact flow and lower displacement for controlled motion or low-demand circuits
Choose: WF8201139
Because: Provides 5.7 GPM at 1.10 in³/r, minimizing heat and energy use
If you need: Medium flow with high drive speed (up to 2800 RPM)
Choose: WF8201144, WF8201171, or WF8201179
Because: Rated for 8.4–9.4 GPM and higher RPM, ideal for faster driven systems
If you need: Left-Hand (CCW) rotation for reverse drive applications
Choose: WF8201179
Because: Specifically designed for counter-clockwise rotation
If you need: Inline ports for straightforward plumbing
Choose: WF8201139 or WF8201138
Because: Feature 0° port orientation for simple pipe routing
If you need: Splined shaft for high-torque or splined coupling
Choose: WF8201139
Because: Only model in this group with 9-tooth splined shaft
Compatibility: All models meet SAE J744 mounting and are 100% Vickers interchangeable. G1″/G1/2″ BSPP straight thread ports and 2-bolt SAE ‘A’ flanges are consistent for easy replacement and integration.
Northern Hydraulics’ specialists can assist with model selection, Vickers cross-referencing, and troubleshooting at (800) 823-4937 (Mon-Fri, 7 AM – 5 PM MST). Volume pricing starts at 4 units. All pumps include a 12-month manufacturer warranty and same-day shipping on in-stock items.
The WF8201139 from Fluidyne directly replaces Vickers WF8201139 units, offering 18.0 cm³/r (1.10 in³/r) displacement and compatibility with systems up to 2500 PSI. This model is part of the V20 series, ensuring 100% interchangeability and easy installation in existing setups..
Commonly used in agricultural equipment, construction machinery, utility vehicles. Learn more about vane pump applications in our resource center. For systems requiring integrated control, explore our pumps with integral valves applications.
Important: Verify pump model WF8201139 matches your existing Vickers unit before ordering. For technical assistance, contact (800) 823-4937.
Most hydraulic pumps ship within 1-2 business days. Made-to-order items typically require 5-7 business days.
For current availability on WF8201139, call (800) 823-4937.
Order online for immediate processing. For single stage vane pumps, online ordering ensures fast turnaround. Phone orders welcome at (800) 823-4937.
Net 30 terms available for approved accounts. For account setup or questions about hydraulic pump compatibility, call our team.
Volume pricing available on orders of 4 or more units.
Questions? Call our specialists: (800) 823-4937
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